Case assembly

A case assembly, comprising:

• a first case having an inner surface and a groove, and the groove located at the inner surface;
• a second case including a main part and a fixing part, the main part detachably disposed on the first case, the fixing part disposed on a side of the main part which is close to the first case;
• a moving mechanism, one end of the moving mechanism pivoted to the inner surface of the first case;
• and
• a block pivoted to another end of the moving mechanism, at least a part of the block slidably located in the groove so that the block is slidable between a fixed position and a detached position;
• wherein when the block is located at the fixed position, the block restricts the fixing part of the second case so as to assemble the second case and the first case together;
• wherein when the moving mechanism drives the block to move from the fixed position to the detached position, the fixing part of the second case is not restricted by the block, and the moving mechanism forces a part of the second case to separate from the first case.